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19 <a href="index.html">All files</a> tree_regexp.js
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175<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">const Regex = require('becke-ch--regex--s0-0-v1--base--pl--lib')
176const GroupBuilder = require('./group_builder')
177&nbsp;
178class TreeRegexp {
179 constructor(regexp) {
180 this._re = 'string' === typeof regexp ? new RegExp(regexp) : regexp
181 this._regex = new Regex(this._re.source, this._re.flags)
182&nbsp;
183 const stack = [new GroupBuilder()]
184 const groupStartStack = []
185 let last = null
186 let escaping = false
187 let nonCapturingMaybe = false
188 let charClass = false
189 this._re.source.split('').forEach((c, n) =&gt; {
190 if (c == '[' &amp;&amp; !escaping) {
191 charClass = true
192 } else if (c == ']' &amp;&amp; !escaping) {
193 charClass = false
194 } else if (c === '(' &amp;&amp; !escaping &amp;&amp; !charClass) {
195 stack.push(new GroupBuilder())
196 groupStartStack.push(n + 1)
197 nonCapturingMaybe = false
198 } else if (c === ')' &amp;&amp; !escaping &amp;&amp; !charClass) {
199 const gb = stack.pop()
200 const groupStart = groupStartStack.pop()
201 if (gb.capturing) {
202 gb.source = this._re.source.substring(groupStart, n)
203 stack[stack.length - 1].add(gb)
204 } else {
205 gb.moveChildrenTo(stack[stack.length - 1])
206 }
207 nonCapturingMaybe = false
208 } else if (c === '?' &amp;&amp; last === '(') {
209 nonCapturingMaybe = true
210 } else if (c === ':' &amp;&amp; nonCapturingMaybe) {
211 stack[stack.length - 1].setNonCapturing()
212 nonCapturingMaybe = false
213 }
214 escaping = c === '\\' &amp;&amp; !escaping
215 last = c
216 })
217 this._groupBuilder = stack.pop()
218 }
219&nbsp;
220 get regexp() {
221 return this._re
222 }
223&nbsp;
224 get groupBuilder() {
225 return this._groupBuilder
226 }
227&nbsp;
228 match(s) {
229 const match = this._regex.exec(s)
230 if (!match) return null
231 let groupIndex = 0
232 const nextGroupIndex = () =&gt; groupIndex++
233 return this._groupBuilder.build(match, nextGroupIndex)
234 }
235}
236&nbsp;
237module.exports = TreeRegexp
238&nbsp;</pre></td></tr>
239</table></pre>
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243 Code coverage
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